“Your account has been blocked.”
You will get out. Whether it takes three hours or three weeks depends entirely on whether you panic-click appeal buttons or write a calm, contextual argument to a machine that is desperately looking for a reason to trust you.
You go to log in. The familiar blue tile appears. You type your password. Then comes the thud.
Do not act like a robot, and do not write like a troll. Write like a lawyer. It works. Have you successfully appealed a Facebook block? Share your timeline in the comments (just don’t spam the link).